Empty Messages with SpamSNAKE

I went through the entire install process except for the PDF and image scanning parts of it. The entire system worked wonderfully for about three months, then last week some users started getting blank messages with the MailScanner signature and nothing else.

Since I administer this box, and no one else has access, I know that nothing was modified by any carbon based life forms. Nothing was upgraded, no config changed - nothing.

After some digging around, I changed one settings in /etc/MailScanner.conf from Lock Type = posix to Lock Type = flock - no luck.

At the moment, the Scan Messages = No so that incoming mail is at least delivered.

Thats a very weird problem you're having. You said it worked for 3 months and then started doing this?

I've been running mine since this guide was posted, but never had any such development.

Do you see the mails coming in through the mailwatch interface? Also, are there any errors in your mail.log while this problem is taking place? Post your mail.log, atleast the last section of it so that I can take a look. Also, post your main.cf and master.cf files.